Section 10.4

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Section 10.4 Determinant of a SQUARE Matrix
With and Without Calculator
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Vocabulary First (Again ? )
Determinant a number (scalar)
Notations
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Try these four
and these four
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• The MINOR of a matrix
• Cross out the row and column of the element
• Compute the determinant of what remains

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The 3 x 3 Determinant
1. Select ANY row or column (most zeros would be
smart)
2. Take each element and multiply it by its
MINOR.

• Apply - - - (to be explained). Remember
  the starts
• with the first row first column element.

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0
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Show the initial expansion of the determinant
below by using the second row.
-
-
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Show the initial expansion of the determinant
below by using the third column.
-
-
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Section 10.4.2 Determinant of a SQUARE Matrix
Calculator Required
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Enter the following matrices into your calculator
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Using your calculator, compute each of the
following
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Right Arrow to see the rest
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Clearing the Matrices on the Calculator